Solve for x
x=y+3
Solve for y
y=x-3
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-4x=-12-4y
Subtract 4y from both sides.
-4x=-4y-12
The equation is in standard form.
\frac{-4x}{-4}=\frac{-4y-12}{-4}
Divide both sides by -4.
x=\frac{-4y-12}{-4}
Dividing by -4 undoes the multiplication by -4.
x=y+3
Divide -12-4y by -4.
4y=-12+4x
Add 4x to both sides.
4y=4x-12
The equation is in standard form.
\frac{4y}{4}=\frac{4x-12}{4}
Divide both sides by 4.
y=\frac{4x-12}{4}
Dividing by 4 undoes the multiplication by 4.
y=x-3
Divide -12+4x by 4.
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